/* *************************************************************************************** * Copyright (C) 2006 EsperTech, Inc. All rights reserved. * * http://www.espertech.com/esper * * http://www.espertech.com * * ---------------------------------------------------------------------------------- * * The software in this package is published under the terms of the GPL license * * a copy of which has been included with this distribution in the license.txt file. * *************************************************************************************** */ package com.espertech.esper.core.service; import com.espertech.esper.client.EventBean; import com.espertech.esper.event.EventBeanUtility; import java.lang.ref.SoftReference; import java.util.Collection; import java.util.IdentityHashMap; public class ExpressionResultCacheForDeclaredExprLastCollImpl implements ExpressionResultCacheForDeclaredExprLastColl { private final IdentityHashMap<Object, SoftReference<ExpressionResultCacheEntry<EventBean[], Collection<EventBean>>>> exprDeclCacheCollection = new IdentityHashMap<Object, SoftReference<ExpressionResultCacheEntry<EventBean[], Collection<EventBean>>>>(); public ExpressionResultCacheEntry<EventBean[], Collection<EventBean>> getDeclaredExpressionLastColl(Object node, EventBean[] eventsPerStream) { SoftReference<ExpressionResultCacheEntry<EventBean[], Collection<EventBean>>> cacheRef = exprDeclCacheCollection.get(node); if (cacheRef == null) { return null; } ExpressionResultCacheEntry<EventBean[], Collection<EventBean>> entry = cacheRef.get(); if (entry == null) { return null; } return EventBeanUtility.compareEventReferences(entry.getReference(), eventsPerStream) ? entry : null; } public void saveDeclaredExpressionLastColl(Object node, EventBean[] eventsPerStream, Collection<EventBean> result) { EventBean[] copy = EventBeanUtility.copyArray(eventsPerStream); ExpressionResultCacheEntry<EventBean[], Collection<EventBean>> entry = new ExpressionResultCacheEntry<EventBean[], Collection<EventBean>>(copy, result); exprDeclCacheCollection.put(node, new SoftReference<ExpressionResultCacheEntry<EventBean[], Collection<EventBean>>>(entry)); } }